<template>
  <div class="swiper-container" ref="mySwiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(item,index) in imageList" :key="index">
        <img :src="item.imgUrl" @click="handler(index)" :class="{active:currentIndex==index}" >
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
//引入依赖包【swiper,swiper.css】
  import Swiper from 'swiper';
  export default {
    name: "ImageList",
    props:['imageList'],
    data(){
           return{
               currentIndex:0,
           }
    },
    watch:{
        imageList(){
            //组件实例对象$nextTick
            this.$nextTick(() => {
                //初始化Swiper实例
                new Swiper (this.$refs.mySwiper ,{
                //设置图片展示几张图
                slidesPerView :3,
                //设置每一次切换，切换几张图
                slidesPerGroup : 3,
                //设置鼠标滚轮切换
                mousewheel:true,
               // 如果需要前进后退按钮
                navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
                },
                });
            });
        },
    },
    methods: {
        handler(index){
        this.currentIndex = index;
        //全事件总线，同时zoom兄弟组件当前显示几张图
        this.$bus.$emit('send',index)
    }
    },
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        // &:hover {
        //   border: 2px solid #f60;
        //   padding: 1px;
        // }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>